8=a-9

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Solution for 8=a-9 equation:


Simplifying
8 = a + -9

Reorder the terms:
8 = -9 + a

Solving
8 = -9 + a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-1a' to each side of the equation.
8 + -1a = -9 + a + -1a

Combine like terms: a + -1a = 0
8 + -1a = -9 + 0
8 + -1a = -9

Add '-8' to each side of the equation.
8 + -8 + -1a = -9 + -8

Combine like terms: 8 + -8 = 0
0 + -1a = -9 + -8
-1a = -9 + -8

Combine like terms: -9 + -8 = -17
-1a = -17

Divide each side by '-1'.
a = 17

Simplifying
a = 17

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